MR3451 Equivalent & Substitute Parts

Part Overview

The MR3451 is a green diffused LED in T-1 3/4 (5mm) through-hole package designed for 12V indication applications. Manufactured by onsemi, this component features a 4mcd brightness rating and 60° viewing angle. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications requiring compatible green LED indicators with identical mechanical and electrical specifications.

Substiute Parts

MR3451

onsemiIn Stock: 1154MR3451 Datasheet

Current PartRFQ

SSL-LX5093GD-12V

Lumex Opto/Components Inc.In Stock: 45288SSL-LX5093GD-12V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The SSL-LX5093GD-12V qualifies as a direct substitute for the MR3451 based on the following critical parameters:

• Color and Lens Transparency: Both parts are green diffused LEDs, ensuring identical visual characteristics
• Lens Size and Package: Both use 5mm T-1 3/4 through-hole radial packages, guaranteeing mechanical compatibility with existing PCB layouts
• Forward Voltage: Both rated at 12V, ensuring electrical compatibility in 12V indication circuits
• Viewing Angle: Both provide 60° viewing angle, maintaining consistent visibility performance
• Wavelength - Peak: Both emit at 565nm, confirming spectral equivalence
• Mounting Type: Both are through-hole components, compatible with standard PCB assembly processes

Parameter Comparison

Engineering Selection Recommendations

The SSL-LX5093GD-12V is the qualified substitute for the obsolete MR3451. Selection is based on:

• Product Status: The MR3451 is obsolete; the SSL-LX5093GD-12V is active and available in production quantities (45,179 pcs in stock)
• Compliance: The SSL-LX5093GD-12V meets ROHS3 compliance, whereas the MR3451 is non-compliant, making the substitute preferable for new designs and regulatory requirements
• Mechanical Compatibility: Identical lens size, package type, and mounting configuration ensure direct PCB layout compatibility
• Electrical Equivalence: Matching 12V forward voltage and 565nm peak wavelength guarantee circuit-level compatibility
• Brightness Consideration: The SSL-LX5093GD-12V provides 20mcd versus the MR3451's 4mcd. This increased brightness is suitable for applications where the original 4mcd specification was not a critical constraint; applications requiring exactly 4mcd brightness should evaluate circuit-level current limiting adjustments

Frequently Asked Questions (FAQ)

Q: Can the SSL-LX5093GD-12V replace the MR3451 in existing designs?

A: Yes. Both parts share identical lens size (5mm T-1 3/4), package type (radial through-hole), forward voltage (12V), and viewing angle (60°). Direct PCB substitution is mechanically and electrically compatible.

Q: What is the difference in brightness between these parts?

A: The MR3451 is rated at 4mcd; the SSL-LX5093GD-12V is rated at 20mcd. The substitute provides higher luminous intensity. If the original design relied on the lower brightness specification, circuit-level current limiting may be adjusted to match the desired brightness output.

Q: Are there height differences between these parts?

A: Yes. The MR3451 has a maximum height of 11.56mm; the SSL-LX5093GD-12V has a maximum height of 8.60mm. The substitute is shorter and will not interfere with designs accommodating the original height specification.

Q: Does the SSL-LX5093GD-12V meet modern compliance standards?

A: Yes. The SSL-LX5093GD-12V is ROHS3 compliant and active in production. The MR3451 is RoHS non-compliant and obsolete, making the substitute the appropriate choice for new designs and regulated applications.

Q: Are the wavelength specifications identical?

A: Yes. Both parts emit at 565nm peak wavelength, ensuring spectral equivalence for green indication applications.

Q: What is the packaging difference?

A: The MR3451 is supplied in standard packaging; the SSL-LX5093GD-12V is supplied in bulk packaging. Both are T-1 3/4 through-hole components suitable for standard PCB assembly processes.